97dc2a1548
This allows unsupported levels to be constant folded away, and so p4d_free_pud_page can be removed because it's no longer linked to. Link: https://lkml.kernel.org/r/20210317062402.533919-10-npiggin@gmail.com Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Ding Tianhong <dingtianhong@huawei.com> Cc: Miaohe Lin <linmiaohe@huawei.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Russell King <linux@armlinux.org.uk> Cc: Uladzislau Rezki (Sony) <urezki@gmail.com> Cc: Will Deacon <will@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
30 lines
545 B
C
30 lines
545 B
C
#ifndef _ASM_X86_VMALLOC_H
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#define _ASM_X86_VMALLOC_H
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#include <asm/cpufeature.h>
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#include <asm/page.h>
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#include <asm/pgtable_areas.h>
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#ifdef CONFIG_HAVE_ARCH_HUGE_VMAP
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static inline bool arch_vmap_p4d_supported(pgprot_t prot)
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{
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return false;
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}
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static inline bool arch_vmap_pud_supported(pgprot_t prot)
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{
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#ifdef CONFIG_X86_64
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return boot_cpu_has(X86_FEATURE_GBPAGES);
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#else
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return false;
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#endif
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}
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static inline bool arch_vmap_pmd_supported(pgprot_t prot)
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{
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return boot_cpu_has(X86_FEATURE_PSE);
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}
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#endif
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#endif /* _ASM_X86_VMALLOC_H */
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